如何解决Python错误：“ UnboundLocalError：分配前已引用本地变量'id1'”

Question

I am trying to create a little game with python. I have made this code :

def create_ennemy() :
    x = 1200
    y = randint(0, 650)
    t = randint(1, 5)
    if t <= 4 :
        id1 = c.create_polygon(7.5, 7.5, 7.5, 37.5, 52.5, 22.5, fill='red')
        r = 22.5
    elif t == 5 :
        c.create_polygon(7.5, 7.5, 7.5, 75, 105, 45, fill='red')
        r = 45
        ennemy_list.append(id1)
        ennemy_type.append(t)

But I get the following error :

File "Jeux-d-avions.py", line 71, in create_ennemy ennemy_list.append(id1) UnboundLocalError: local variable 'id1' referenced before assignment

I searched on the internet but it did not solve my problem. Why my code is not working?

Answer 1

In your code, there is no assignment of id1 in the case of elif

I guess what you mean should be as follows:

 def create_ennemy() :
    x = 1200
    y = randint(0, 650)
    t = randint(1, 5)
    if t <= 4 :
        id1 = c.create_polygon(7.5, 7.5, 7.5, 37.5, 52.5, 22.5, fill='red')
        r = 22.5
    elif t == 5 :
        id1 = c.create_polygon(7.5, 7.5, 7.5, 75, 105, 45, fill='red')
        r = 45
    ennemy_list.append(id1)
    ennemy_type.append(t)

Answer 2

There is no issue in your code, you just need to indent your code and a minor change to assign id1 .

def create_ennemy() :
    x = 1200
    y = randint(0, 650)
    t = randint(1, 5)
    if t <= 4 :
        id1 = c.create_polygon(7.5, 7.5, 7.5, 37.5, 52.5, 22.5, fill='red')
        r = 22.5
    elif t == 5 :
        id1 = c.create_polygon(7.5, 7.5, 7.5, 75, 105, 45, fill='red')
        r = 45

    ennemy_list.append(id1)
    ennemy_type.append(t)

this will fix you mentioned error.